Timothy Richard Sullivan is a Canadian composer, pianist, and music educator. A member of the Canadian League of Composers and an associate of the Canadian Music Centre, he has been commissioned to write works for ARRAYMUSIC, Donald Bell, and the Stratford Festival among others. He is particularly known for his operas and was notably composer-in-residence at the Canadian Opera Company in 1987–1988. His composition are noted for their use of various media and incorporation of several musical idioms, including jazz, chance music, traditional harmony, and serialism.[1]